In the critical period of rice growth, the jointing and booting stage, some farmers found that rice leaves have a large area of ​​red leaves. What is the reason for this phenomenon and how can it be cured?
Reasons why leaves of rice turn red during booting
The reason why leaves turn red during booting is mainly due to the parallel high temperature weather in this stage of growth. The transpiration of plant leaves is intense under hot, sunny and hot weather, and physiological water shortages are prone to occur. In addition, under high temperature conditions, strong irrigation may cause the root system of rice to be in a flooded anaerobic soil environment for a long time, and the root system will turn yellow and black due to lack of oxygen and eventually lose its vitality. As a result, plant nutrient absorption has created obstacles that eventually lead to physiological potassium deficiency, and yellowing or browning of the leaves are symptoms.
Control method of turning red leaves of rice during booting stage
1, water management. Alternating wet and dry, each time only shallow water irrigation, the field can not see the water and then poured into shallow water, repeated cycle operation can be.
2. Apply some potassium-containing fertilizers in time, such as foliar spray of 0.2-0.3% potassium dihydrogen phosphate solution or 0.5% potassium nitrate solution to relieve illness and slow down the functional leaf lifespan and improve the photosynthetic efficiency of leaves. To promote grain filling and fruit setting purposes.
In addition, rice enters the booting stage to the heading stage, and the management of the disease should be strengthened in the production, and the method of moist irrigation should be adopted to protect the roots and protect the roots. For the fields with poor early fielding and the current soil is still soft or even bad, we still have to stick to the soft field. Even if rice is in the stage of heading and flowering, as long as there are no large cracks in the field, it is not possible to put water on it; When it is time, a thin layer of water should be poured and water should be drained for about 3 days.
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